A wave of violence in Turkey has seen riot police clash with protesters for a fourth day running. Security forces used tear gas and water cannons, as protesters responded with stones and built barricades. Activists also tried to break through police lines and attack the Prime Minister's office. RT's Irina Galushko reports from Istanbul.

Turkish police fired tear gas at demonstrators before retreating from Taksim Square in Istanbul on Saturday. In Ankara, a police vehicle hit two demonstrators who were crouched in the middle of the street, barricading themselves behind rubbish bins.